<!DOCTYPE html>
<pre id="mainThreadScrollingReasons"></pre>
<style>
.composited-background-attachment-fixed {
    height: 1000px;
    background: url('grid.png') fixed;
    will-change: transform;
}
</style>

<div class="composited-background-attachment-fixed">
</div>

<script>
window.addEventListener('load', function() {
    document.getElementById("mainThreadScrollingReasons").innerText = internals.mainThreadScrollingReasons(document);
});
</script>
